<?php
/**
 * Smarty Internal Plugin Compile Section
 *
 * Compiles the {section} {sectionelse} {/section} tags
 *
 * @package Smarty
 * @subpackage Compiler
 * @author Uwe Tews
 */

/**
 * Smarty Internal Plugin Compile Section Class
 */
class Smarty_Internal_Compile_Section extends Smarty_Internal_CompileBase {
	// attribute definitions
	public $required_attributes = array ('name', 'loop' );
	public $shorttag_order = array ('name', 'loop' );
	public $optional_attributes = array ('start', 'step', 'max', 'show' );
	
	/**
	 * Compiles code for the {section} tag
	 *
	 * @param array $args array with attributes from parser
	 * @param object $compiler compiler object
	 * @return string compiled code
	 */
	public function compile($args, $compiler) {
		$this->compiler = $compiler;
		// check and get attributes
		$_attr = $this->_get_attributes ( $args );
		
		$this->_open_tag ( 'section', array ('section', $this->compiler->nocache ) );
		// maybe nocache because of nocache variables
		$this->compiler->nocache = $this->compiler->nocache | $this->compiler->tag_nocache;
		
		$output = "<?php ";
		
		$section_name = $_attr ['name'];
		
		$output .= "unset(\$_smarty_tpl->tpl_vars['smarty']->value['section'][$section_name]);\n";
		$section_props = "\$_smarty_tpl->tpl_vars['smarty']->value['section'][$section_name]";
		
		foreach ( $_attr as $attr_name => $attr_value ) {
			switch ($attr_name) {
				case 'loop' :
					$output .= "{$section_props}['loop'] = is_array(\$_loop=$attr_value) ? count(\$_loop) : max(0, (int)\$_loop); unset(\$_loop);\n";
					break;
				
				case 'show' :
					if (is_bool ( $attr_value ))
						$show_attr_value = $attr_value ? 'true' : 'false';
					else
						$show_attr_value = "(bool)$attr_value";
					$output .= "{$section_props}['show'] = $show_attr_value;\n";
					break;
				
				case 'name' :
					$output .= "{$section_props}['$attr_name'] = $attr_value;\n";
					break;
				
				case 'max' :
				case 'start' :
					$output .= "{$section_props}['$attr_name'] = (int)$attr_value;\n";
					break;
				
				case 'step' :
					$output .= "{$section_props}['$attr_name'] = ((int)$attr_value) == 0 ? 1 : (int)$attr_value;\n";
					break;
			}
		}
		
		if (! isset ( $_attr ['show'] ))
			$output .= "{$section_props}['show'] = true;\n";
		
		if (! isset ( $_attr ['loop'] ))
			$output .= "{$section_props}['loop'] = 1;\n";
		
		if (! isset ( $_attr ['max'] ))
			$output .= "{$section_props}['max'] = {$section_props}['loop'];\n";
		else
			$output .= "if ({$section_props}['max'] < 0)\n" . "    {$section_props}['max'] = {$section_props}['loop'];\n";
		
		if (! isset ( $_attr ['step'] ))
			$output .= "{$section_props}['step'] = 1;\n";
		
		if (! isset ( $_attr ['start'] ))
			$output .= "{$section_props}['start'] = {$section_props}['step'] > 0 ? 0 : {$section_props}['loop']-1;\n";
		else {
			$output .= "if ({$section_props}['start'] < 0)\n" . "    {$section_props}['start'] = max({$section_props}['step'] > 0 ? 0 : -1, {$section_props}['loop'] + {$section_props}['start']);\n" . "else\n" . "    {$section_props}['start'] = min({$section_props}['start'], {$section_props}['step'] > 0 ? {$section_props}['loop'] : {$section_props}['loop']-1);\n";
		}
		
		$output .= "if ({$section_props}['show']) {\n";
		if (! isset ( $_attr ['start'] ) && ! isset ( $_attr ['step'] ) && ! isset ( $_attr ['max'] )) {
			$output .= "    {$section_props}['total'] = {$section_props}['loop'];\n";
		} else {
			$output .= "    {$section_props}['total'] = min(ceil(({$section_props}['step'] > 0 ? {$section_props}['loop'] - {$section_props}['start'] : {$section_props}['start']+1)/abs({$section_props}['step'])), {$section_props}['max']);\n";
		}
		$output .= "    if ({$section_props}['total'] == 0)\n" . "        {$section_props}['show'] = false;\n" . "} else\n" . "    {$section_props}['total'] = 0;\n";
		
		$output .= "if ({$section_props}['show']):\n";
		$output .= "
            for ({$section_props}['index'] = {$section_props}['start'], {$section_props}['iteration'] = 1;
            {$section_props}['iteration'] <= {$section_props}['total'];
            {$section_props}['index'] += {$section_props}['step'], {$section_props}['iteration']++):\n";
		$output .= "{$section_props}['rownum'] = {$section_props}['iteration'];\n";
		$output .= "{$section_props}['index_prev'] = {$section_props}['index'] - {$section_props}['step'];\n";
		$output .= "{$section_props}['index_next'] = {$section_props}['index'] + {$section_props}['step'];\n";
		$output .= "{$section_props}['first']      = ({$section_props}['iteration'] == 1);\n";
		$output .= "{$section_props}['last']       = ({$section_props}['iteration'] == {$section_props}['total']);\n";
		
		$output .= "?>";
		return $output;
	}
}

/**
 * Smarty Internal Plugin Compile Sectionelse Class
 */
class Smarty_Internal_Compile_Sectionelse extends Smarty_Internal_CompileBase {
	/**
	 * Compiles code for the {sectionelse} tag
	 *
	 * @param array $args array with attributes from parser
	 * @param object $compiler compiler object
	 * @return string compiled code
	 */
	public function compile($args, $compiler) {
		$this->compiler = $compiler;
		// check and get attributes
		$_attr = $this->_get_attributes ( $args );
		
		list ( $_open_tag, $nocache ) = $this->_close_tag ( array ('section' ) );
		$this->_open_tag ( 'sectionelse', array ('sectionelse', $nocache ) );
		
		return "<?php endfor; else: ?>";
	}
}

/**
 * Smarty Internal Plugin Compile Sectionclose Class
 */
class Smarty_Internal_Compile_Sectionclose extends Smarty_Internal_CompileBase {
	/**
	 * Compiles code for the {/section} tag
	 *
	 * @param array $args array with attributes from parser
	 * @param object $compiler compiler object
	 * @return string compiled code
	 */
	public function compile($args, $compiler) {
		$this->compiler = $compiler;
		// check and get attributes
		$_attr = $this->_get_attributes ( $args );
		
		// must endblock be nocache?
		if ($this->compiler->nocache) {
			$this->compiler->tag_nocache = true;
		}
		
		list ( $_open_tag, $this->compiler->nocache ) = $this->_close_tag ( array ('section', 'sectionelse' ) );
		
		if ($_open_tag == 'sectionelse')
			return "<?php endif; ?>";
		else
			return "<?php endfor; endif; ?>";
	}
}

?>